It's a small and simple MIDI player with OPN2 (Yamaha YM2612) or OPNA (YM2608) FM synthesis. The player can play any MIDI MUS or XMI file you will have on your device. Player has General-MIDI and Semi-XG compatible bank timbre bank made from imported instruments from various Sega Megadrive/Genesis games ported from OPL3 or originally made. Optionally you can use external timbre bank file in WOPN to get the different sounding of your music.

# Key features of the libOPNMIDI synthesizer:
* OPN2 emulation
* Customizable bank of FM patches (You have to use the bank editor (https://github.com/Wohlstand/OPN2BankEditor) to create own soundbank)
* Stereo sound
* Number of simulated OPN2 chips can be specified as 1-100 (maximum channels 600!)
* Pan (binary panning i.e. left/right side on/off)
* Pitch-bender with adjustable range
* Vibrato that responds to RPN/NRPN parameters
* Sustain (a.k.a. Pedal hold) and Sostenuto enable/disable
* MIDI and RMI file support
* Real-Time MIDI API support
* loopStart / loopEnd tag support (Final Fantasy VII)
* 111'th controller based loop start (RPG-Maker)
* Use automatic arpeggio with chords to relieve channel pressure
* Support for multiple concurrent MIDI synthesizers (per-track device/port select FF 09 message) can be used to overcome 16 channel limit
* Partial support for GS and XG standards (having more instruments than in one 128:128 GM set and ability to use multiple channels for percussion purposes and support for some GS/XG exclusive controllers)
* CC74 "Brightness" affects a modulator scale (to simulate frequency cut-off on WT synths)
* Portamento support (CC5 CC37 and CC65)
* SysEx support that supports some generic GS and XG features
* Full-panning stereo option (works for emulators only)

# Links
* The source code of player: https://github.com/Wohlstand/OPNMIDI-Player-Java
* The source code of libOPNMIDI: https://github.com/Wohlstand/libOPNMIDI
* The OPN2 bank editor which allows you to create or modify WOPL timbre bank files: https://github.com/Wohlstand/OPN2BankEditor/